Here are instructions on how to publish a fully illustrated coffee table book by collecting text and images with Amazon's Mechanical Turk, then printing the book on demand with Blurb.com. This instructable covers how to source, edit, layout, print and promote a book that is written and illustrated by others, for you.
Step 1: Brainstorm topics
First brainstorm some topics that people want to write about. My wife Tania suggested to make a book about pets. Specifically, cats. Every cat owner loves to tell you about how fluffy Zooey is, how cute it is when Gary drinks out of the sink, how amazing Socks' toilet flush trick is, etc.
In addition to thinking about topics for stories, also think about good visuals. Asking people to draw paper clips is unlikely to result in a lot of interesting submissions. If you ask them to draw a cutaway view of a combustion engine, they'll say no because that's too complicated. Babies, pets, stuffed animals, favorite places - keep it simple but emotionally rich.